GameMaker: Better Controller Support

Allows you to use the controller or keyboard via one click. Usually, once the controller/gamepad is connected to your game, you can't use the keyboard anymore until the controller/gamepad is no longer connected. This small code allows you to have your controller/gamepad connected to your game, but you can still use your keyboard if you click any key. But, if you press any button on your controller it will switch to use that instead.